text: /******************************************************************************
   *                       ____    _    _____                                   *
   *                      / ___|  / \  |  ___|    C++                           *
   *                     | |     / _ \ | |_       Actor                         *
   *                     | |___ / ___ \|  _|      Framework                     *
   *                      \____/_/   \_|_|                                      *
   *                                                                            *
   * Copyright (C) 2011 - 2017                                                  *
   * Dominik Charousset <dominik.charousset (at) haw-hamburg.de>                *
   *                                                                            *
   * Distributed under the terms and conditions of the BSD 3-Clause License or  *
   * (at your option) under the terms and conditions of the Boost Software      *
   * License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE.       *
   *                                                                            *
   * If you did not receive a copy of the license files, see                    *
   * http://opensource.org/licenses/BSD-3-Clause and                            *
   * http://www.boost.org/LICENSE_1_0.txt.                                      *
   ******************************************************************************/
  
  #ifndef CAF_BROADCAST_SCATTERER_HPP
  #define CAF_BROADCAST_SCATTERER_HPP
  
  #include "caf/buffered_scatterer.hpp"
  
  namespace caf {
  
  template <class T>
  class broadcast_scatterer : public buffered_scatterer<T> {
  public:
    using super = buffered_scatterer<T>;
  
    broadcast_scatterer(local_actor* selfptr) : super(selfptr) {
      // nop
    }
  
    long credit() const override {
      // We receive messages until we have exhausted all downstream credit and
      // have filled our buffer to its minimum size.
      return this->min_credit() + this->min_buffer_size();
    }
  
    void emit_batches() override {
      CAF_LOG_TRACE("");
      auto chunk = this->get_chunk(this->min_credit());
      auto csize = static_cast<long>(chunk.size());
      CAF_LOG_TRACE(CAF_ARG(chunk));
      if (csize == 0)
        return;
      auto wrapped_chunk = make_message(std::move(chunk));
      for (auto& x : this->paths_) {
        CAF_ASSERT(x->open_credit >= csize);
        x->emit_batch(csize, wrapped_chunk);
      }
    }
  };
  
  } // namespace caf
  
  #endif // CAF_BROADCAST_SCATTERER_HPP
  